diff --git a/app/Api/V1/Controllers/AccountController.php b/app/Api/V1/Controllers/AccountController.php
index d5e0d4d255..f7bd0580f2 100644
--- a/app/Api/V1/Controllers/AccountController.php
+++ b/app/Api/V1/Controllers/AccountController.php
@@ -30,6 +30,7 @@ use FireflyIII\Models\AccountType;
 use FireflyIII\Repositories\Account\AccountRepositoryInterface;
 use FireflyIII\Repositories\Currency\CurrencyRepositoryInterface;
 use FireflyIII\Transformers\AccountTransformer;
+use FireflyIII\User;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Pagination\LengthAwarePaginator;
@@ -57,12 +58,14 @@ class AccountController extends Controller
         parent::__construct();
         $this->middleware(
             function ($request, $next) {
+                /** @var User $user */
+                $user = auth()->user();
                 // @var AccountRepositoryInterface repository
                 $this->repository = app(AccountRepositoryInterface::class);
-                $this->repository->setUser(auth()->user());
+                $this->repository->setUser($user);
 
                 $this->currencyRepository = app(CurrencyRepositoryInterface::class);
-                $this->currencyRepository->setUser(auth()->user());
+                $this->currencyRepository->setUser($user);
 
                 return $next($request);
             }
@@ -93,7 +96,7 @@ class AccountController extends Controller
     public function index(Request $request): JsonResponse
     {
         // create some objects:
-        $manager = new Manager();
+        $manager = new Manager;
         $baseUrl = $request->getSchemeAndHttpHost() . '/api/v1';
 
         // read type from URI
@@ -129,7 +132,7 @@ class AccountController extends Controller
      */
     public function show(Request $request, Account $account): JsonResponse
     {
-        $manager = new Manager();
+        $manager = new Manager;
 
         // add include parameter:
         $include = $request->get('include') ?? '';
@@ -156,7 +159,7 @@ class AccountController extends Controller
             $data['currency_id'] = null === $currency ? 0 : $currency->id;
         }
         $account = $this->repository->store($data);
-        $manager = new Manager();
+        $manager = new Manager;
         $baseUrl = $request->getSchemeAndHttpHost() . '/api/v1';
         $manager->setSerializer(new JsonApiSerializer($baseUrl));
 
@@ -184,7 +187,7 @@ class AccountController extends Controller
         // set correct type:
         $data['type'] = config('firefly.shortNamesByFullName.' . $account->accountType->type);
         $this->repository->update($account, $data);
-        $manager = new Manager();
+        $manager = new Manager;
         $baseUrl = $request->getSchemeAndHttpHost() . '/api/v1';
         $manager->setSerializer(new JsonApiSerializer($baseUrl));
 
diff --git a/app/Api/V1/Controllers/AttachmentController.php b/app/Api/V1/Controllers/AttachmentController.php
new file mode 100644
index 0000000000..5c67f0e387
--- /dev/null
+++ b/app/Api/V1/Controllers/AttachmentController.php
@@ -0,0 +1,227 @@
+<?php
+/**
+ * AttachmentController.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Controllers;
+
+use FireflyIII\Api\V1\Requests\AttachmentRequest;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Helpers\Attachments\AttachmentHelperInterface;
+use FireflyIII\Models\Attachment;
+use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
+use FireflyIII\Transformers\AttachmentTransformer;
+use FireflyIII\User;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Http\Response as LaravelResponse;
+use Illuminate\Pagination\LengthAwarePaginator;
+use League\Fractal\Manager;
+use League\Fractal\Pagination\IlluminatePaginatorAdapter;
+use League\Fractal\Resource\Collection as FractalCollection;
+use League\Fractal\Resource\Item;
+use League\Fractal\Serializer\JsonApiSerializer;
+
+/**
+ * Class AttachmentController
+ */
+class AttachmentController extends Controller
+{
+    /** @var AttachmentRepositoryInterface */
+    private $repository;
+
+    /**
+     * AccountController constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware(
+            function ($request, $next) {
+                /** @var User $user */
+                $user             = auth()->user();
+                $this->repository = app(AttachmentRepositoryInterface::class);
+                $this->repository->setUser($user);
+
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     *
+     * @param  int $id
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function destroy($id)
+    {
+        //
+    }
+
+    /**
+     * @param Attachment $attachment
+     *
+     * @return LaravelResponse
+     * @throws FireflyException
+     */
+    public function download(Attachment $attachment): LaravelResponse
+    {
+        if ($attachment->uploaded === false) {
+            throw new FireflyException('No file has been uploaded for this attachment (yet).');
+        }
+        if ($this->repository->exists($attachment)) {
+            $content = $this->repository->getContent($attachment);
+            $quoted  = sprintf('"%s"', addcslashes(basename($attachment->filename), '"\\'));
+
+            /** @var LaravelResponse $response */
+            $response = response($content, 200);
+            $response
+                ->header('Content-Description', 'File Transfer')
+                ->header('Content-Type', 'application/octet-stream')
+                ->header('Content-Disposition', 'attachment; filename=' . $quoted)
+                ->header('Content-Transfer-Encoding', 'binary')
+                ->header('Connection', 'Keep-Alive')
+                ->header('Expires', '0')
+                ->header('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
+                ->header('Pragma', 'public')
+                ->header('Content-Length', \strlen($content));
+
+            return $response;
+        }
+        throw new FireflyException('Could not find the indicated attachment. The file is no longer there.');
+    }
+
+    /**
+     * Display a listing of the resource.
+     *
+     * @param Request $request
+     *
+     * @return JsonResponse
+     */
+    public function index(Request $request): JsonResponse
+    {
+        // create some objects:
+        $manager = new Manager;
+        $baseUrl = $request->getSchemeAndHttpHost() . '/api/v1';
+
+        // types to get, page size:
+        $pageSize = (int)app('preferences')->getForUser(auth()->user(), 'listPageSize', 50)->data;
+
+        // get list of accounts. Count it and split it.
+        $collection  = $this->repository->get();
+        $count       = $collection->count();
+        $attachments = $collection->slice(($this->parameters->get('page') - 1) * $pageSize, $pageSize);
+
+        // make paginator:
+        $paginator = new LengthAwarePaginator($attachments, $count, $pageSize, $this->parameters->get('page'));
+        $paginator->setPath(route('api.v1.attachments.index') . $this->buildParams());
+
+        // present to user.
+        $manager->setSerializer(new JsonApiSerializer($baseUrl));
+        $resource = new FractalCollection($attachments, new AttachmentTransformer($this->parameters), 'attachments');
+        $resource->setPaginator(new IlluminatePaginatorAdapter($paginator));
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+    }
+
+    /**
+     * Display the specified resource.
+     *
+     * @param Request    $request
+     * @param Attachment $attachment
+     *
+     * @return JsonResponse
+     */
+    public function show(Request $request, Attachment $attachment): JsonResponse
+    {
+        $manager = new Manager;
+
+        // add include parameter:
+        $include = $request->get('include') ?? '';
+        $manager->parseIncludes($include);
+
+        $baseUrl = $request->getSchemeAndHttpHost() . '/api/v1';
+        $manager->setSerializer(new JsonApiSerializer($baseUrl));
+        $resource = new Item($attachment, new AttachmentTransformer($this->parameters), 'attachments');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     *
+     * @param  \Illuminate\Http\Request $request
+     *
+     * @return \Illuminate\Http\Response
+     * @throws FireflyException
+     */
+    public function store(AttachmentRequest $request): JsonResponse
+    {
+        $data       = $request->getAll();
+        $attachment = $this->repository->store($data);
+        $manager    = new Manager;
+        $baseUrl    = $request->getSchemeAndHttpHost() . '/api/v1';
+        $manager->setSerializer(new JsonApiSerializer($baseUrl));
+        $resource = new Item($attachment, new AttachmentTransformer($this->parameters), 'attachments');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+    }
+
+    /**
+     * Update the specified resource in storage.
+     *
+     * @param AttachmentRequest $request
+     * @param Attachment        $attachment
+     *
+     * @return JsonResponse
+     */
+    public function update(AttachmentRequest $request, Attachment $attachment): JsonResponse
+    {
+        $data = $request->getAll();
+        $this->repository->update($attachment, $data);
+        $manager = new Manager;
+        $baseUrl = $request->getSchemeAndHttpHost() . '/api/v1';
+        $manager->setSerializer(new JsonApiSerializer($baseUrl));
+
+        $resource = new Item($attachment, new AttachmentTransformer($this->parameters), 'attachments');
+
+        return response()->json($manager->createData($resource)->toArray())->header('Content-Type', 'application/vnd.api+json');
+    }
+
+    /**
+     * @param Request    $request
+     * @param Attachment $attachment
+     *
+     * @return LaravelResponse
+     */
+    public function upload(Request $request, Attachment $attachment): LaravelResponse
+    {
+        /** @var AttachmentHelperInterface $helper */
+        $helper = app(AttachmentHelperInterface::class);
+        $body   = $request->getContent();
+        $helper->saveAttachmentFromApi($attachment, $body);
+
+        return response('', 200);
+    }
+
+}
\ No newline at end of file
diff --git a/app/Api/V1/Requests/AttachmentRequest.php b/app/Api/V1/Requests/AttachmentRequest.php
new file mode 100644
index 0000000000..30da4d2683
--- /dev/null
+++ b/app/Api/V1/Requests/AttachmentRequest.php
@@ -0,0 +1,92 @@
+<?php
+/**
+ * AttachmentRequest.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Api\V1\Requests;
+
+use FireflyIII\Models\Bill;
+use FireflyIII\Models\ImportJob;
+use FireflyIII\Models\TransactionJournal;
+use FireflyIII\Rules\IsBase64;
+use FireflyIII\Rules\IsValidAttachmentModel;
+
+/**
+ * Class AttachmentRequest
+ */
+class AttachmentRequest extends Request
+{
+    /**
+     * @return bool
+     */
+    public function authorize(): bool
+    {
+        // Only allow authenticated users
+        return auth()->check();
+    }
+
+    /**
+     * @return array
+     */
+    public function getAll(): array
+    {
+        return [
+            'filename' => $this->string('filename'),
+            'title'    => $this->string('title'),
+            'notes'    => $this->string('notes'),
+            'model'    => $this->string('model'),
+            'model_id' => $this->integer('model_id'),
+        ];
+    }
+
+    /**
+     * @return array
+     */
+    public function rules(): array
+    {
+        $models = implode(
+            ',', [
+                   Bill::class,
+                   ImportJob::class,
+                   TransactionJournal::class,
+               ]
+        );
+        $model  = $this->string('model');
+        $rules  = [
+            'filename' => 'required|between:1,255',
+            'title'    => 'between:1,255',
+            'notes'    => 'between:1,65000',
+            'model'    => sprintf('required|in:%s', $models),
+            'model_id' => ['required', 'numeric', new IsValidAttachmentModel($model)],
+        ];
+        switch ($this->method()) {
+            default:
+                break;
+            case 'PUT':
+            case 'PATCH':
+                unset($rules['model'], $rules['model_id']);
+                $rules['filename'] = 'between:1,255';
+                break;
+        }
+
+        return $rules;
+    }
+}
\ No newline at end of file
diff --git a/app/Factory/AttachmentFactory.php b/app/Factory/AttachmentFactory.php
new file mode 100644
index 0000000000..b728625a4c
--- /dev/null
+++ b/app/Factory/AttachmentFactory.php
@@ -0,0 +1,79 @@
+<?php
+/**
+ * AttachmentFactory.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Factory;
+
+use FireflyIII\Models\Attachment;
+use FireflyIII\Models\Note;
+use FireflyIII\User;
+
+/**
+ * Class AttachmentFactory
+ */
+class AttachmentFactory
+{
+    /** @var User */
+    private $user;
+
+    /**
+     * @param array $data
+     *
+     * @return Attachment|null
+     */
+    public function create(array $data): ?Attachment
+    {
+        // create attachment:
+        $attachment = Attachment::create(
+            [
+                'user_id'         => $this->user->id,
+                'attachable_id'   => $data['model_id'],
+                'attachable_type' => $data['model'],
+                'md5'             => '',
+                'filename'        => $data['filename'],
+                'title'           => '' === $data['title'] ? null : $data['title'],
+                'description'     => null,
+                'mime'            => '',
+                'size'            => 0,
+                'uploaded'        => 0,
+            ]
+        );
+        $notes      = (string)($data['notes'] ?? '');
+        if ('' !== $notes) {
+            $note = new Note;
+            $note->noteable()->associate($attachment);
+            $note->text = $notes;
+            $note->save();
+        }
+
+        return $attachment;
+    }
+
+    /**
+     * @param User $user
+     */
+    public function setUser(User $user): void
+    {
+        $this->user = $user;
+    }
+
+}
\ No newline at end of file
diff --git a/app/Helpers/Attachments/AttachmentHelper.php b/app/Helpers/Attachments/AttachmentHelper.php
index 72a00bab0c..b6d950042f 100644
--- a/app/Helpers/Attachments/AttachmentHelper.php
+++ b/app/Helpers/Attachments/AttachmentHelper.php
@@ -122,6 +122,46 @@ class AttachmentHelper implements AttachmentHelperInterface
         return $this->messages;
     }
 
+    /**
+     * Uploads a file as a string.
+     *
+     * @param Attachment $attachment
+     * @param string     $content
+     *
+     * @return bool
+     */
+    public function saveAttachmentFromApi(Attachment $attachment, string $content): bool
+    {
+        $resource = tmpfile();
+        if (false === $resource) {
+            Log::error('Cannot create temp-file for file upload.');
+
+            return false;
+        }
+        $path = stream_get_meta_data($resource)['uri'];
+        fwrite($resource, $content);
+        $finfo       = finfo_open(FILEINFO_MIME_TYPE);
+        $mime        = finfo_file($finfo, $path);
+        $allowedMime = config('firefly.allowedMimes');
+        if (!\in_array($mime, $allowedMime, true)) {
+            Log::error(sprintf('Mime type %s is not allowed for API file upload.', $mime));
+
+            return false;
+        }
+        // is allowed? Save the file!
+        $encrypted = Crypt::encrypt($content);
+        $this->uploadDisk->put($attachment->fileName(), $encrypted);
+
+        // update attachment.
+        $attachment->md5      = md5_file($path);
+        $attachment->mime     = $mime;
+        $attachment->size     = \strlen($content);
+        $attachment->uploaded = 1;
+        $attachment->save();
+
+        return true;
+    }
+
     /**
      * @param Model      $model
      * @param array|null $files
@@ -232,7 +272,7 @@ class AttachmentHelper implements AttachmentHelperInterface
         Log::debug(sprintf('Name is %s, and mime is %s', $name, $mime));
         Log::debug('Valid mimes are', $this->allowedMimes);
 
-        if (!\in_array($mime, $this->allowedMimes)) {
+        if (!\in_array($mime, $this->allowedMimes, true)) {
             $msg = (string)trans('validation.file_invalid_mime', ['name' => $name, 'mime' => $mime]);
             $this->errors->add('attachments', $msg);
             Log::error($msg);
diff --git a/app/Helpers/Attachments/AttachmentHelperInterface.php b/app/Helpers/Attachments/AttachmentHelperInterface.php
index 03fd095727..8f34041faa 100644
--- a/app/Helpers/Attachments/AttachmentHelperInterface.php
+++ b/app/Helpers/Attachments/AttachmentHelperInterface.php
@@ -61,6 +61,16 @@ interface AttachmentHelperInterface
      */
     public function getMessages(): MessageBag;
 
+    /**
+     * Uploads a file as a string.
+     *
+     * @param Attachment $attachment
+     * @param string     $content
+     *
+     * @return bool
+     */
+    public function saveAttachmentFromApi(Attachment $attachment, string $content): bool;
+
     /**
      * @param Model      $model
      * @param null|array $files
diff --git a/app/Models/Account.php b/app/Models/Account.php
index c29fe3c988..3c2c4f761f 100644
--- a/app/Models/Account.php
+++ b/app/Models/Account.php
@@ -44,6 +44,7 @@ use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
  * @property AccountType $accountType
  * @property bool        $active
  * @property string      $virtual_balance
+ * @property User $user
  */
 class Account extends Model
 {
diff --git a/app/Models/Attachment.php b/app/Models/Attachment.php
index 044283cbdb..c0d71a8fa7 100644
--- a/app/Models/Attachment.php
+++ b/app/Models/Attachment.php
@@ -22,6 +22,7 @@ declare(strict_types=1);
 
 namespace FireflyIII\Models;
 
+use Carbon\Carbon;
 use Crypt;
 use FireflyIII\User;
 use Illuminate\Database\Eloquent\Model;
@@ -32,6 +33,20 @@ use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Class Attachment.
+ *
+ * @property int    $id
+ * @property Carbon $created_at
+ * @property Carbon $updated_at
+ * @property string $attachable_type
+ * @property string $md5
+ * @property string $filename
+ * @property string $title
+ * @property string $description
+ * @property string $notes
+ * @property string $mime
+ * @property int    $size
+ * @property User   $user
+ * @property bool   $uploaded
  */
 class Attachment extends Model
 {
@@ -100,9 +115,9 @@ class Attachment extends Model
      * @return null|string
      * @throws \Illuminate\Contracts\Encryption\DecryptException
      */
-    public function getDescriptionAttribute($value)
+    public function getDescriptionAttribute($value): ?string
     {
-        if (null === $value || 0 === \strlen($value)) {
+        if (null === $value || '' === $value) {
             return null;
         }
 
@@ -116,9 +131,9 @@ class Attachment extends Model
      * @return null|string
      * @throws \Illuminate\Contracts\Encryption\DecryptException
      */
-    public function getFilenameAttribute($value)
+    public function getFilenameAttribute($value): ?string
     {
-        if (null === $value || 0 === \strlen($value)) {
+        if (null === $value || '' === $value) {
             return null;
         }
 
@@ -132,9 +147,9 @@ class Attachment extends Model
      * @return null|string
      * @throws \Illuminate\Contracts\Encryption\DecryptException
      */
-    public function getMimeAttribute($value)
+    public function getMimeAttribute($value): ?string
     {
-        if (null === $value || 0 === \strlen($value)) {
+        if (null === $value || '' === $value) {
             return null;
         }
 
@@ -148,9 +163,9 @@ class Attachment extends Model
      * @return null|string
      * @throws \Illuminate\Contracts\Encryption\DecryptException
      */
-    public function getTitleAttribute($value)
+    public function getTitleAttribute($value): ?string
     {
-        if (null === $value || 0 === \strlen($value)) {
+        if (null === $value || '' === $value) {
             return null;
         }
 
@@ -169,13 +184,14 @@ class Attachment extends Model
     /**
      * @codeCoverageIgnore
      *
-     * @param string $value
-     *
-     * @throws \Illuminate\Contracts\Encryption\EncryptException
+     * @param string|null $value
      */
-    public function setDescriptionAttribute(string $value)
+    public function setDescriptionAttribute(string $value = null): void
     {
-        $this->attributes['description'] = Crypt::encrypt($value);
+        if (null !== $value) {
+            $this->attributes['description'] = Crypt::encrypt($value);
+        }
+
     }
 
     /**
@@ -185,7 +201,7 @@ class Attachment extends Model
      *
      * @throws \Illuminate\Contracts\Encryption\EncryptException
      */
-    public function setFilenameAttribute(string $value)
+    public function setFilenameAttribute(string $value): void
     {
         $this->attributes['filename'] = Crypt::encrypt($value);
     }
@@ -197,7 +213,7 @@ class Attachment extends Model
      *
      * @throws \Illuminate\Contracts\Encryption\EncryptException
      */
-    public function setMimeAttribute(string $value)
+    public function setMimeAttribute(string $value): void
     {
         $this->attributes['mime'] = Crypt::encrypt($value);
     }
@@ -209,9 +225,11 @@ class Attachment extends Model
      *
      * @throws \Illuminate\Contracts\Encryption\EncryptException
      */
-    public function setTitleAttribute(string $value)
+    public function setTitleAttribute(string $value = null): void
     {
-        $this->attributes['title'] = Crypt::encrypt($value);
+        if (null !== $value) {
+            $this->attributes['title'] = Crypt::encrypt($value);
+        }
     }
 
     /**
diff --git a/app/Models/Bill.php b/app/Models/Bill.php
index 3da9e56add..81da6f180d 100644
--- a/app/Models/Bill.php
+++ b/app/Models/Bill.php
@@ -22,23 +22,34 @@ declare(strict_types=1);
 
 namespace FireflyIII\Models;
 
+use Carbon\Carbon;
 use Crypt;
 use FireflyIII\User;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Support\Collection;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Class Bill.
  *
- * @property bool   $active
- * @property int    $transaction_currency_id
- * @property string $amount_min
- * @property string $amount_max
- * @property int    $id
- * @property string $name
+ * @property bool                $active
+ * @property int                 $transaction_currency_id
+ * @property string              $amount_min
+ * @property string              $amount_max
+ * @property int                 $id
+ * @property string              $name
+ * @property Collection          $notes
+ * @property TransactionCurrency $transactionCurrency
+ * @property Carbon              $created_at
+ * @property Carbon              $updated_at
+ * @property Carbon $date
+ * @property string $repeat_freq
+ * @property int $skip
+ * @property bool $automatch
+ * @property User $user
  */
 class Bill extends Model
 {
diff --git a/app/Models/Note.php b/app/Models/Note.php
index f2cc1ddb20..316b65089e 100644
--- a/app/Models/Note.php
+++ b/app/Models/Note.php
@@ -22,12 +22,17 @@ declare(strict_types=1);
 
 namespace FireflyIII\Models;
 
+use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Model;
 
 /**
  * Class Note.
  *
+ * @property int    $id
+ * @property Carbon $created_at
+ * @property Carbon $updated_at
  * @property string $text
+ * @property string $title
  */
 class Note extends Model
 {
diff --git a/app/Models/PiggyBank.php b/app/Models/PiggyBank.php
index 92819a5d28..82721a243a 100644
--- a/app/Models/PiggyBank.php
+++ b/app/Models/PiggyBank.php
@@ -38,6 +38,7 @@ use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
  * @property string $targetamount
  * @property int $id
  * @property string $name
+ * @property Account $account
  *
  */
 class PiggyBank extends Model
diff --git a/app/Models/Rule.php b/app/Models/Rule.php
index c3c4acd811..4d368acec2 100644
--- a/app/Models/Rule.php
+++ b/app/Models/Rule.php
@@ -22,19 +22,30 @@ declare(strict_types=1);
 
 namespace FireflyIII\Models;
 
+use Carbon\Carbon;
 use FireflyIII\User;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Support\Collection;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Class Rule.
  *
- * @property bool                           $stop_processing
- * @property int                            $id
- * @property \Illuminate\Support\Collection $ruleTriggers
- * @property bool                           $active
- * @property bool                           $strict
+ * @property bool       $stop_processing
+ * @property int        $id
+ * @property Collection $ruleTriggers
+ * @property Collection $ruleActions
+ * @property bool       $active
+ * @property bool       $strict
+ * @property User       $user
+ * @property Carbon     $created_at
+ * @property Carbon     $updated_at
+ * @property string     $title
+ * @property string     $text
+ * @property int        $order
+ * @property RuleGroup  $ruleGroup
  */
 class Rule extends Model
 {
@@ -78,9 +89,9 @@ class Rule extends Model
 
     /**
      * @codeCoverageIgnore
-     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     * @return HasMany
      */
-    public function ruleActions()
+    public function ruleActions(): HasMany
     {
         return $this->hasMany(RuleAction::class);
     }
diff --git a/app/Models/RuleAction.php b/app/Models/RuleAction.php
index da9e6c048a..7ca38fcc39 100644
--- a/app/Models/RuleAction.php
+++ b/app/Models/RuleAction.php
@@ -22,10 +22,20 @@ declare(strict_types=1);
 
 namespace FireflyIII\Models;
 
+use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Model;
 
 /**
  * Class RuleAction.
+ *
+ * @property string $action_value
+ * @property string $action_type
+ * @property int    $id
+ * @property Carbon $created_at
+ * @property Carbon $updated_at
+ * @property int    $order
+ * @property bool   $active
+ * @property bool   $stop_processing
  */
 class RuleAction extends Model
 {
diff --git a/app/Models/RuleGroup.php b/app/Models/RuleGroup.php
index 149b12fc4d..8bbbc74e8b 100644
--- a/app/Models/RuleGroup.php
+++ b/app/Models/RuleGroup.php
@@ -22,6 +22,7 @@ declare(strict_types=1);
 
 namespace FireflyIII\Models;
 
+use Carbon\Carbon;
 use FireflyIII\User;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
@@ -30,7 +31,14 @@ use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 /**
  * Class RuleGroup.
  *
- * @property bool $active
+ * @property bool   $active
+ * @property User   $user
+ * @property Carbon $created_at
+ * @property Carbon $updated_at
+ * @property string $title
+ * @property string $text
+ * @property int $id
+ * @property int $order
  */
 class RuleGroup extends Model
 {
diff --git a/app/Models/RuleTrigger.php b/app/Models/RuleTrigger.php
index 58265d0d1c..b030f9d836 100644
--- a/app/Models/RuleTrigger.php
+++ b/app/Models/RuleTrigger.php
@@ -22,6 +22,7 @@ declare(strict_types=1);
 
 namespace FireflyIII\Models;
 
+use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Model;
 
 /**
@@ -29,6 +30,12 @@ use Illuminate\Database\Eloquent\Model;
  *
  * @property string $trigger_value
  * @property string $trigger_type
+ * @property int    $id
+ * @property Carbon $created_at
+ * @property Carbon $updated_at
+ * @property int    $order
+ * @property bool   $active
+ * @property bool   $stop_processing
  */
 class RuleTrigger extends Model
 {
diff --git a/app/Repositories/Attachment/AttachmentRepository.php b/app/Repositories/Attachment/AttachmentRepository.php
index 36d38ade9d..d5eac20346 100644
--- a/app/Repositories/Attachment/AttachmentRepository.php
+++ b/app/Repositories/Attachment/AttachmentRepository.php
@@ -25,6 +25,8 @@ namespace FireflyIII\Repositories\Attachment;
 use Carbon\Carbon;
 use Crypt;
 use Exception;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Factory\AttachmentFactory;
 use FireflyIII\Helpers\Attachments\AttachmentHelperInterface;
 use FireflyIII\Models\Attachment;
 use FireflyIII\Models\Note;
@@ -179,11 +181,30 @@ class AttachmentRepository implements AttachmentRepositoryInterface
     /**
      * @param User $user
      */
-    public function setUser(User $user)
+    public function setUser(User $user): void
     {
         $this->user = $user;
     }
 
+    /**
+     * @param array $data
+     *
+     * @return Attachment
+     * @throws FireflyException
+     */
+    public function store(array $data): Attachment
+    {
+        /** @var AttachmentFactory $factory */
+        $factory = app(AttachmentFactory::class);
+        $factory->setUser($this->user);
+        $result = $factory->create($data);
+        if (null === $result) {
+            throw new FireflyException('Could not store attachment.');
+        }
+
+        return $result;
+    }
+
     /**
      * @param Attachment $attachment
      * @param array      $data
@@ -193,8 +214,13 @@ class AttachmentRepository implements AttachmentRepositoryInterface
     public function update(Attachment $attachment, array $data): Attachment
     {
         $attachment->title = $data['title'];
+
+        // update filename, if present and different:
+        if (isset($data['filename']) && '' !== $data['filename'] && $data['filename'] !== $attachment->filename) {
+            $attachment->filename = $data['filename'];
+        }
         $attachment->save();
-        $this->updateNote($attachment, $data['notes']);
+        $this->updateNote($attachment, $data['notes'] ?? '');
 
         return $attachment;
     }
@@ -207,7 +233,7 @@ class AttachmentRepository implements AttachmentRepositoryInterface
      */
     public function updateNote(Attachment $attachment, string $note): bool
     {
-        if (0 === \strlen($note)) {
+        if ('' === $note) {
             $dbNote = $attachment->notes()->first();
             if (null !== $dbNote) {
                 $dbNote->delete();
diff --git a/app/Repositories/Attachment/AttachmentRepositoryInterface.php b/app/Repositories/Attachment/AttachmentRepositoryInterface.php
index 0a2b63b537..30caf2c253 100644
--- a/app/Repositories/Attachment/AttachmentRepositoryInterface.php
+++ b/app/Repositories/Attachment/AttachmentRepositoryInterface.php
@@ -23,6 +23,7 @@ declare(strict_types=1);
 namespace FireflyIII\Repositories\Attachment;
 
 use Carbon\Carbon;
+use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Models\Attachment;
 use FireflyIII\User;
 use Illuminate\Support\Collection;
@@ -95,6 +96,14 @@ interface AttachmentRepositoryInterface
      */
     public function setUser(User $user);
 
+    /**
+     * @param array $data
+     *
+     * @return Attachment
+     * @throws FireflyException
+     */
+    public function store(array $data): Attachment;
+
     /**
      * @param Attachment $attachment
      * @param array      $attachmentData
diff --git a/app/Rules/IsValidAttachmentModel.php b/app/Rules/IsValidAttachmentModel.php
new file mode 100644
index 0000000000..db2959c7c8
--- /dev/null
+++ b/app/Rules/IsValidAttachmentModel.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * IsValidAttachmentModel.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Rules;
+
+
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Models\TransactionJournal;
+use FireflyIII\Repositories\Journal\JournalRepositoryInterface;
+use Illuminate\Contracts\Validation\Rule;
+
+/**
+ * Class IsValidAttachmentModel
+ */
+class IsValidAttachmentModel implements Rule
+{
+    /** @var string */
+    private $model;
+
+    /**
+     * IsValidAttachmentModel constructor.
+     *
+     * @param string $model
+     */
+    public function __construct(string $model)
+    {
+        $this->model = $model;
+    }
+
+    /**
+     * Get the validation error message.
+     *
+     * @return string
+     */
+    public function message(): string
+    {
+        return trans('validation.model_id_invalid');
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     *
+     * @param  string $attribute
+     * @param  mixed  $value
+     *
+     * @return bool
+     * @throws FireflyException
+     */
+    public function passes($attribute, $value): bool
+    {
+        if (!auth()->check()) {
+            return false;
+        }
+        $user = auth()->user();
+        switch ($this->model) {
+            default:
+                throw new FireflyException(sprintf('Model "%s" cannot be validated.', $this->model));
+            case TransactionJournal::class:
+                /** @var JournalRepositoryInterface $repository */
+                $repository = app(JournalRepositoryInterface::class);
+                $repository->setUser($user);
+                $result     = $repository->findNull((int)$value);
+
+                return null !== $result;
+                break;
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/Transformers/AccountTransformer.php b/app/Transformers/AccountTransformer.php
index 099398fd8c..c238a28dd8 100644
--- a/app/Transformers/AccountTransformer.php
+++ b/app/Transformers/AccountTransformer.php
@@ -153,7 +153,7 @@ class AccountTransformer extends TransformerAbstract
         }
         $currencyId     = (int)$this->repository->getMetaValue($account, 'currency_id');
         $currencyCode   = null;
-        $currencySymbol = 'x';
+        $currencySymbol = null;
         $decimalPlaces  = 2;
         if ($currencyId > 0) {
             $currency       = TransactionCurrency::find($currencyId);
diff --git a/app/Transformers/AttachmentTransformer.php b/app/Transformers/AttachmentTransformer.php
index 0db1993352..81ba473173 100644
--- a/app/Transformers/AttachmentTransformer.php
+++ b/app/Transformers/AttachmentTransformer.php
@@ -28,6 +28,7 @@ use FireflyIII\Models\Attachment;
 use League\Fractal\Resource\Item;
 use League\Fractal\TransformerAbstract;
 use Symfony\Component\HttpFoundation\ParameterBag;
+use League\Fractal\Resource\Collection as FractalCollection;
 
 /**
  * Class AttachmentTransformer
@@ -39,13 +40,13 @@ class AttachmentTransformer extends TransformerAbstract
      *
      * @var array
      */
-    protected $availableIncludes = ['user'];
+    protected $availableIncludes = ['user','notes'];
     /**
      * List of resources to automatically include
      *
      * @var array
      */
-    protected $defaultIncludes = ['user'];
+    protected $defaultIncludes = ['user','notes'];
 
     /** @var ParameterBag */
     protected $parameters;
@@ -76,6 +77,20 @@ class AttachmentTransformer extends TransformerAbstract
         return $this->item($attachment->user, new UserTransformer($this->parameters), 'user');
     }
 
+    /**
+     * Attach the notes.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param Attachment $attachment
+     *
+     * @return FractalCollection
+     */
+    public function includeNotes(Attachment $attachment): FractalCollection
+    {
+        return $this->collection($attachment->notes, new NoteTransformer($this->parameters), 'notes');
+    }
+
     /**
      * Transform attachment.
      *
@@ -92,11 +107,11 @@ class AttachmentTransformer extends TransformerAbstract
             'attachable_type' => $attachment->attachable_type,
             'md5'             => $attachment->md5,
             'filename'        => $attachment->filename,
+            'download_uri'    => route('api.v1.attachments.download', [$attachment->id]),
+            'upload_uri'      => route('api.v1.attachments.upload', [$attachment->id]),
             'title'           => $attachment->title,
-            'description'     => $attachment->description,
-            'notes'           => $attachment->notes,
             'mime'            => $attachment->mime,
-            'size'            => $attachment->size,
+            'size'            => (int)$attachment->size,
             'links'           => [
                 [
                     'rel' => 'self',
diff --git a/app/Transformers/BillTransformer.php b/app/Transformers/BillTransformer.php
index 78a17fe43d..86c7516833 100644
--- a/app/Transformers/BillTransformer.php
+++ b/app/Transformers/BillTransformer.php
@@ -26,7 +26,6 @@ namespace FireflyIII\Transformers;
 use Carbon\Carbon;
 use FireflyIII\Helpers\Collector\JournalCollectorInterface;
 use FireflyIII\Models\Bill;
-use FireflyIII\Models\Note;
 use FireflyIII\Repositories\Bill\BillRepositoryInterface;
 use Illuminate\Support\Collection;
 use League\Fractal\Resource\Collection as FractalCollection;
@@ -45,13 +44,13 @@ class BillTransformer extends TransformerAbstract
      *
      * @var array
      */
-    protected $availableIncludes = ['attachments', 'transactions', 'user'];
+    protected $availableIncludes = ['attachments', 'transactions', 'user', 'notes', 'rules'];
     /**
      * List of resources to automatically include
      *
      * @var array
      */
-    protected $defaultIncludes = [];
+    protected $defaultIncludes = ['notes', 'rules'];
 
     /** @var ParameterBag */
     protected $parameters;
@@ -83,6 +82,40 @@ class BillTransformer extends TransformerAbstract
         return $this->collection($attachments, new AttachmentTransformer($this->parameters), 'attachments');
     }
 
+    /**
+     * Attach the notes.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param Bill $bill
+     *
+     * @return FractalCollection
+     */
+    public function includeNotes(Bill $bill): FractalCollection
+    {
+        return $this->collection($bill->notes, new NoteTransformer($this->parameters), 'notes');
+    }
+
+    /**
+     * Attach the rules.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param Bill $bill
+     *
+     * @return FractalCollection
+     */
+    public function includeRules(Bill $bill): FractalCollection
+    {
+        /** @var BillRepositoryInterface $repository */
+        $repository = app(BillRepositoryInterface::class);
+        $repository->setUser($bill->user);
+        // add info about rules:
+        $rules = $repository->getRulesForBill($bill);
+
+        return $this->collection($rules, new RuleTransformer($this->parameters), 'rules');
+    }
+
     /**
      * Include any transactions.
      *
@@ -141,19 +174,17 @@ class BillTransformer extends TransformerAbstract
             'name'                => $bill->name,
             'currency_id'         => $bill->transaction_currency_id,
             'currency_code'       => $bill->transactionCurrency->code,
-            'match'               => explode(',', $bill->match),
             'amount_min'          => round($bill->amount_min, 2),
             'amount_max'          => round($bill->amount_max, 2),
             'date'                => $bill->date->format('Y-m-d'),
             'repeat_freq'         => $bill->repeat_freq,
             'skip'                => (int)$bill->skip,
-            'automatch'           => (int)$bill->automatch === 1,
-            'active'              => (int)$bill->active === 1,
+            'automatch'           => $bill->automatch,
+            'active'              => $bill->active,
             'attachments_count'   => $bill->attachments()->count(),
             'pay_dates'           => $payDates,
             'paid_dates'          => $paidData['paid_dates'],
             'next_expected_match' => $paidData['next_expected_match'],
-            'notes'               => null,
             'links'               => [
                 [
                     'rel' => 'self',
@@ -161,11 +192,6 @@ class BillTransformer extends TransformerAbstract
                 ],
             ],
         ];
-        /** @var Note $note */
-        $note = $bill->notes()->first();
-        if (null !== $note) {
-            $data['notes'] = $note->text;
-        }
 
         return $data;
 
diff --git a/app/Transformers/NoteTransformer.php b/app/Transformers/NoteTransformer.php
new file mode 100644
index 0000000000..9cf804c45a
--- /dev/null
+++ b/app/Transformers/NoteTransformer.php
@@ -0,0 +1,92 @@
+<?php
+/**
+ * NoteTransformer.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Transformers;
+
+
+use FireflyIII\Models\Note;
+use League\CommonMark\CommonMarkConverter;
+use League\Fractal\TransformerAbstract;
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+/**
+ * Class NoteTransformer
+ */
+class NoteTransformer extends TransformerAbstract
+{
+    /**
+     * List of resources possible to include
+     *
+     * @var array
+     */
+    protected $availableIncludes = [];
+    /**
+     * List of resources to automatically include
+     *
+     * @var array
+     */
+    protected $defaultIncludes = [];
+
+    /** @var ParameterBag */
+    protected $parameters;
+
+    /**
+     * CurrencyTransformer constructor.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param ParameterBag $parameters
+     */
+    public function __construct(ParameterBag $parameters)
+    {
+        $this->parameters = $parameters;
+    }
+
+    /**
+     * Transform the note.
+     *
+     * @param Note $note
+     *
+     * @return array
+     */
+    public function transform(Note $note): array
+    {
+        $converter = new CommonMarkConverter;
+        $data      = [
+            'id'         => (int)$note->id,
+            'updated_at' => $note->updated_at->toAtomString(),
+            'created_at' => $note->created_at->toAtomString(),
+            'title'      => $note->title,
+            'text'       => $note->text,
+            'markdown'   => $converter->convertToHtml($note->text),
+            'links'      => [
+                [
+                    'rel' => 'self',
+                    'uri' => '/notes/' . $note->id,
+                ],
+            ],
+        ];
+
+        return $data;
+    }
+}
\ No newline at end of file
diff --git a/app/Transformers/RuleActionTransformer.php b/app/Transformers/RuleActionTransformer.php
new file mode 100644
index 0000000000..a0a8401716
--- /dev/null
+++ b/app/Transformers/RuleActionTransformer.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ * RuleActionTransformer.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Transformers;
+
+
+use FireflyIII\Models\RuleAction;
+use FireflyIII\Models\RuleTrigger;
+use League\Fractal\TransformerAbstract;
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+/**
+ * Class RuleActionTransformer
+ */
+class RuleActionTransformer extends TransformerAbstract
+{
+    /**
+     * List of resources possible to include
+     *
+     * @var array
+     */
+    protected $availableIncludes = [];
+    /**
+     * List of resources to automatically include
+     *
+     * @var array
+     */
+    protected $defaultIncludes = [];
+
+    /** @var ParameterBag */
+    protected $parameters;
+
+    /**
+     * CurrencyTransformer constructor.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param ParameterBag $parameters
+     */
+    public function __construct(ParameterBag $parameters)
+    {
+        $this->parameters = $parameters;
+    }
+
+    /**
+     * Transform the rule action.
+     *
+     * @param RuleAction $ruleAction
+     *
+     * @return array
+     */
+    public function transform(RuleAction $ruleAction): array
+    {
+        $data = [
+            'id'              => (int)$ruleAction->id,
+            'updated_at'      => $ruleAction->updated_at->toAtomString(),
+            'created_at'      => $ruleAction->created_at->toAtomString(),
+            'action_type'    => $ruleAction->action_type,
+            'action_value'   => $ruleAction->action_value,
+            'order'           => $ruleAction->order,
+            'active'          => $ruleAction->active,
+            'stop_processing' => $ruleAction->stop_processing,
+            'links'           => [
+                [
+                    'rel' => 'self',
+                    'uri' => '/rule_triggers/' . $ruleAction->id,
+                ],
+            ],
+        ];
+
+        return $data;
+    }
+}
\ No newline at end of file
diff --git a/app/Transformers/RuleGroupTransformer.php b/app/Transformers/RuleGroupTransformer.php
new file mode 100644
index 0000000000..5cbd579a54
--- /dev/null
+++ b/app/Transformers/RuleGroupTransformer.php
@@ -0,0 +1,110 @@
+<?php
+/**
+ * RuleGroupTransformer.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Transformers;
+
+
+use FireflyIII\Models\RuleGroup;
+use League\Fractal\Resource\Item;
+use League\Fractal\TransformerAbstract;
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+/**
+ * Class RuleGroupTransformer
+ */
+class RuleGroupTransformer extends TransformerAbstract
+{
+    /**
+     * List of resources possible to include
+     *
+     * @var array
+     */
+    protected $availableIncludes = ['user'];
+    /**
+     * List of resources to automatically include
+     *
+     * @var array
+     */
+    protected $defaultIncludes = ['user'];
+
+    /** @var ParameterBag */
+    protected $parameters;
+
+    /**
+     * CurrencyTransformer constructor.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param ParameterBag $parameters
+     */
+    public function __construct(ParameterBag $parameters)
+    {
+        $this->parameters = $parameters;
+    }
+
+
+    /**
+     * Include the user.
+     *
+     * @param RuleGroup $ruleGroup
+     *
+     * @codeCoverageIgnore
+     * @return Item
+     */
+    public function includeUser(RuleGroup $ruleGroup): Item
+    {
+        return $this->item($ruleGroup->user, new UserTransformer($this->parameters), 'users');
+    }
+
+    /**
+     * Transform the rule group
+     *
+     * @param RuleGroup $ruleGroup
+     *
+     * @return array
+     */
+    public function transform(RuleGroup $ruleGroup): array
+    {
+        $data = [
+            'id'         => (int)$ruleGroup->id,
+            'updated_at' => $ruleGroup->updated_at->toAtomString(),
+            'created_at' => $ruleGroup->created_at->toAtomString(),
+            'title'      => $ruleGroup->title,
+            'text'       => $ruleGroup->text,
+            'order'      => $ruleGroup->order,
+            'active'     => $ruleGroup->active,
+            'links'      => [
+                [
+                    'rel' => 'self',
+                    'uri' => '/rule_groups/' . $ruleGroup->id,
+                ],
+            ],
+        ];
+
+        return $data;
+    }
+
+
+}
+
+
diff --git a/app/Transformers/RuleTransformer.php b/app/Transformers/RuleTransformer.php
new file mode 100644
index 0000000000..35db378eeb
--- /dev/null
+++ b/app/Transformers/RuleTransformer.php
@@ -0,0 +1,140 @@
+<?php
+/**
+ * RuleTransformer.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Transformers;
+
+
+use FireflyIII\Models\Rule;
+use League\Fractal\Resource\Item;
+use League\Fractal\TransformerAbstract;
+use Symfony\Component\HttpFoundation\ParameterBag;
+use League\Fractal\Resource\Collection as FractalCollection;
+
+/**
+ * Class RuleTransformer
+ */
+class RuleTransformer extends TransformerAbstract
+{
+    /**
+     * List of resources possible to include
+     *
+     * @var array
+     */
+    protected $availableIncludes = ['rule_group', 'rule_triggers', 'rule_actions', 'user'];
+    /**
+     * List of resources to automatically include
+     *
+     * @var array
+     */
+    protected $defaultIncludes = ['rule_group', 'rule_triggers', 'rule_actions'];
+
+    /** @var ParameterBag */
+    protected $parameters;
+
+    /**
+     * CurrencyTransformer constructor.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param ParameterBag $parameters
+     */
+    public function __construct(ParameterBag $parameters)
+    {
+        $this->parameters = $parameters;
+    }
+
+    /**
+     * @param Rule $rule
+     *
+     * @return FractalCollection
+     */
+    public function includeRuleTriggers(Rule $rule): FractalCollection {
+        return $this->collection($rule->ruleTriggers, new RuleTriggerTransformer($this->parameters), 'rule_triggers');
+    }
+
+    /**
+     * @param Rule $rule
+     *
+     * @return FractalCollection
+     */
+    public function includeRuleActions(Rule $rule): FractalCollection {
+        return $this->collection($rule->ruleActions, new RuleActionTransformer($this->parameters), 'rule_actions');
+    }
+
+    /**
+     * Include the user.
+     *
+     * @param Rule $rule
+     *
+     * @codeCoverageIgnore
+     * @return Item
+     */
+    public function includeUser(Rule $rule): Item
+    {
+        return $this->item($rule->user, new UserTransformer($this->parameters), 'users');
+    }
+
+
+    /**
+     * Include the rule group.
+     *
+     * @param Rule $rule
+     *
+     * @codeCoverageIgnore
+     * @return Item
+     */
+    public function includeRuleGroup(Rule $rule): Item
+    {
+        return $this->item($rule->ruleGroup, new RuleGroupTransformer($this->parameters), 'rule_groups');
+    }
+
+    /**
+     * Transform the rule.
+     *
+     * @param Rule $rule
+     *
+     * @return array
+     */
+    public function transform(Rule $rule): array
+    {
+        $data = [
+            'id'              => (int)$rule->id,
+            'updated_at'      => $rule->updated_at->toAtomString(),
+            'created_at'      => $rule->created_at->toAtomString(),
+            'title'           => $rule->title,
+            'text'            => $rule->text,
+            'order'           => (int)$rule->order,
+            'active'          => $rule->active,
+            'stop_processing' => $rule->stop_processing,
+            'strict'          => $rule->strict,
+            'links'           => [
+                [
+                    'rel' => 'self',
+                    'uri' => '/rules/' . $rule->id,
+                ],
+            ],
+        ];
+
+        return $data;
+    }
+}
\ No newline at end of file
diff --git a/app/Transformers/RuleTriggerTransformer.php b/app/Transformers/RuleTriggerTransformer.php
new file mode 100644
index 0000000000..6c51c84bb3
--- /dev/null
+++ b/app/Transformers/RuleTriggerTransformer.php
@@ -0,0 +1,92 @@
+<?php
+/**
+ * RuleTriggerTransformer.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Transformers;
+
+
+use FireflyIII\Models\RuleTrigger;
+use League\Fractal\TransformerAbstract;
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+/**
+ * Class RuleTriggerTransformer
+ */
+class RuleTriggerTransformer extends TransformerAbstract
+{
+    /**
+     * List of resources possible to include
+     *
+     * @var array
+     */
+    protected $availableIncludes = [];
+    /**
+     * List of resources to automatically include
+     *
+     * @var array
+     */
+    protected $defaultIncludes = [];
+
+    /** @var ParameterBag */
+    protected $parameters;
+
+    /**
+     * CurrencyTransformer constructor.
+     *
+     * @codeCoverageIgnore
+     *
+     * @param ParameterBag $parameters
+     */
+    public function __construct(ParameterBag $parameters)
+    {
+        $this->parameters = $parameters;
+    }
+
+    /**
+     * Transform the rule trigger.
+     *
+     * @param RuleTrigger $ruleTrigger
+     *
+     * @return array
+     */
+    public function transform(RuleTrigger $ruleTrigger): array
+    {
+        $data = [
+            'id'              => (int)$ruleTrigger->id,
+            'updated_at'      => $ruleTrigger->updated_at->toAtomString(),
+            'created_at'      => $ruleTrigger->created_at->toAtomString(),
+            'trigger_type'    => $ruleTrigger->trigger_type,
+            'trigger_value'   => $ruleTrigger->trigger_value,
+            'order'           => $ruleTrigger->order,
+            'active'          => $ruleTrigger->active,
+            'stop_processing' => $ruleTrigger->stop_processing,
+            'links'           => [
+                [
+                    'rel' => 'self',
+                    'uri' => '/rule_triggers/' . $ruleTrigger->id,
+                ],
+            ],
+        ];
+
+        return $data;
+    }
+}
\ No newline at end of file
diff --git a/resources/lang/en_US/validation.php b/resources/lang/en_US/validation.php
index d8764ef5a9..66df306ae7 100644
--- a/resources/lang/en_US/validation.php
+++ b/resources/lang/en_US/validation.php
@@ -44,6 +44,8 @@ return [
     'belongs_to_user'                => 'The value of :attribute is unknown',
     'accepted'                       => 'The :attribute must be accepted.',
     'bic'                            => 'This is not a valid BIC.',
+    'base64'                         => 'This is not valid base64 encoded data.',
+    'model_id_invalid'               => 'The given ID seems invalid for this model.',
     'more'                           => ':attribute must be larger than zero.',
     'active_url'                     => 'The :attribute is not a valid URL.',
     'after'                          => 'The :attribute must be a date after :date.',
diff --git a/routes/api.php b/routes/api.php
index eeca33c0f6..6db99723e3 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -43,6 +43,21 @@ Route::group(
     }
 );
 
+Route::group(
+        ['middleware' => ['auth:api', 'bindings'], 'namespace' => 'FireflyIII\Api\V1\Controllers', 'prefix' => 'attachments', 'as' => 'api.v1.attachments.'],
+    function () {
+
+        // Accounts API routes:
+        Route::get('', ['uses' => 'AttachmentController@index', 'as' => 'index']);
+        Route::post('', ['uses' => 'AttachmentController@store', 'as' => 'store']);
+        Route::get('{attachment}', ['uses' => 'AttachmentController@show', 'as' => 'show']);
+        Route::get('{attachment}/download', ['uses' => 'AttachmentController@download', 'as' => 'download']);
+        Route::post('{attachment}/upload', ['uses' => 'AttachmentController@upload', 'as' => 'upload']);
+        Route::put('{attachment}', ['uses' => 'AttachmentController@update', 'as' => 'update']);
+        Route::delete('{attachment}', ['uses' => 'AttachmentController@delete', 'as' => 'delete']);
+    }
+);
+
 
 Route::group(
     ['middleware' => ['auth:api', 'bindings'], 'namespace' => 'FireflyIII\Api\V1\Controllers', 'prefix' => 'bills', 'as' => 'api.v1.bills.'], function () {